The represents the pinnacle of LWD resistivity imaging. It has transformed geosteering from a reactive process ("Where are we now?") to a predictive process ("Where are we going?").
To address these challenges, Schlumberger and other industry leaders are investing in research and development, focusing on:
To apply this understanding to your specific formation evaluation needs, consider exploring the latest wireline and LWD technologies from SLB. If you have further questions, please ask.
to orient micro-resistivity "buttons" so fractures can be mapped in 3D. Sonic Logging schlumberger ngi tool
The NGI tool typically serves as the primary orientation sensor for complex toolstrings (like those containing imaging or sonic tools). Its primary outputs include: Borehole Inclination : Measures the angle of the borehole from vertical.
Identifies capacitive variations across the formation boundary. Voltage Return (Phase) Compensates for borehole roughness and stick-slip effects. ZMBAM Mud Button Impedance (Amplitude) Measures real-time borehole fluid changes. 🚀 Key Advantages of the NGI Architecture 1. Photorealistic Imaging in Oil-Based Mud (OBM)
Raw analog signals from the receiver coils are digitized immediately within the tool. Advanced mathematical algorithms process these signals in real-time, stripping out environmental noise and borehole skin effects before sending the data to the surface. Key Benefits of the NGI Tool The represents the pinnacle of LWD resistivity imaging
(Voltage Return, Amplitude, Frequency 1) for various pads and buttons. Applications in Formation Evaluation Thinly Bedded Reservoirs
Detailed reports generated from these tools are critical for: Quanta Geo Photorealistic Reservoir Geology Service | SLB
: Provides critical data to decide where to place perforations or hydraulic fractures by identifying "hard streaks" or natural fracture networks. If you have further questions, please ask
: Dedicated reference tracks continuously calibrate the signal for varying mud cake thickness. Raw Telemetered Parameters
Traditional WBM Tools (FMI) --> Direct galvanic contact (Fails in OBM) First-Gen OBM Tools (OBMI) --> Early micro-laterolog voltage pads Next-Gen OGI/NGI Tools --> High-frequency capacitive coupling & multi-pad articulation Key Technical Specifications & Architecture Borehole Imaging Technology | SLB
The is a critical asset in advanced downhole formation evaluation, engineered to deliver high-resolution visualization and compositional logging of complex reservoirs. Designed by SLB (Schlumberger) , this digital downhole platform provides real-time geological insights by evaluating natural radioactivity alongside advanced azimuthal measurements. By capturing discrete rock-fluid interfaces, structural features, and lithological changes, the NGI tool allows exploration and production (E&P) companies to minimize structural uncertainty and optimize well placement. The Core Technology Behind the NGI Tool
Mapping structural geology and tracking continuous reservoir sand bodies across an entire field.
The Schlumberger NGI tool is an advanced induction logging instrument designed to measure the electrical resistivity of subsurface formations. Electrical resistivity is a foundational measurement in petrophysics; because hydrocarbons (oil and gas) are highly resistive while formation water is highly conductive, resistivity logs are essential for calculating fluid saturation and identifying commercial pay zones.